diff options
Diffstat (limited to 'nptl/sysdeps')
| -rw-r--r-- | nptl/sysdeps/pthread/pthread_rwlock_unlock.c | 21 | ||||
| -rw-r--r-- | nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_rwlock_unlock.S | 26 |
2 files changed, 38 insertions, 9 deletions
diff --git a/nptl/sysdeps/pthread/pthread_rwlock_unlock.c b/nptl/sysdeps/pthread/pthread_rwlock_unlock.c index 6e0c92ba3f..9cae8b6c22 100644 --- a/nptl/sysdeps/pthread/pthread_rwlock_unlock.c +++ b/nptl/sysdeps/pthread/pthread_rwlock_unlock.c @@ -24,27 +24,32 @@ #include <pthreadP.h> /* Unlock RWLOCK. */ -int __pthread_rwlock_unlock (pthread_rwlock_t *rwlock) +int +__pthread_rwlock_unlock (pthread_rwlock_t *rwlock) { - lll_mutex_lock(rwlock->__data.__lock); + lll_mutex_lock (rwlock->__data.__lock); if (rwlock->__data.__writer) rwlock->__data.__writer = 0; else - rwlock->__data.__nr_readers--; - if (!rwlock->__data.__nr_readers) + --rwlock->__data.__nr_readers; + if (rwlock->__data.__nr_readers == 0) { if (rwlock->__data.__nr_writers_queued) { ++rwlock->__data.__writer_wakeup; - lll_futex_wake(&rwlock->__data.__writer_wakeup, 1); + lll_mutex_unlock (rwlock->__data.__lock); + lll_futex_wake (&rwlock->__data.__writer_wakeup, 1); + return 0; } - else + else if (rwlock->__data.__nr_readers_queued) { ++rwlock->__data.__readers_wakeup; - lll_futex_wake(&rwlock->__data.__readers_wakeup, INT_MAX); + lll_mutex_unlock (rwlock->__data.__lock); + lll_futex_wake (&rwlock->__data.__readers_wakeup, INT_MAX); + return 0; } } - lll_mutex_unlock(rwlock->__data.__lock); + lll_mutex_unlock (rwlock->__data.__lock); return 0; } diff --git a/nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_rwlock_unlock.S b/nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_rwlock_unlock.S index bb5f8d1bc8..7dd97ba49e 100644 --- a/nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_rwlock_unlock.S +++ b/nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_rwlock_unlock.S @@ -76,10 +76,25 @@ __pthread_rwlock_unlock: leal READERS_WAKEUP(%edi), %ebx 0: incl (%ebx) - xorl %esi, %esi + LOCK +#if MUTEX == 0 + decl (%edi) +#else + decl MUTEX(%edi) +#endif + jne 7f + +8: xorl %esi, %esi movl $SYS_futex, %eax ENTER_KERNEL + xorl %eax, %eax + popl %edi + popl %esi + popl %ebx + ret + + .align 16 6: LOCK #if MUTEX == 0 decl (%edi) @@ -112,6 +127,15 @@ __pthread_rwlock_unlock: call __lll_mutex_unlock_wake jmp 4b +7: +#if MUTEX == 0 + movl %edi, %eax +#else + leal MUTEX(%edx), %eax +#endif + call __lll_mutex_unlock_wake + jmp 8b + .size __pthread_rwlock_unlock,.-__pthread_rwlock_unlock .globl pthread_rwlock_unlock |